PROBLEM TO BE SOLVED: To provide a new therapy of a platinum resistant cancer.SOLUTION: The therapy treats a platinum resistant ovarian cancer, primary peritoneal cancer, or fallopian tube cancer by using a combination of gemcitabine and HER2 antibody capable of effectively inhibiting a dimerization of HER.COPYRIGHT: (C)2013,JPO&INPIT【課題】プラチナ耐性ガンの新規な治療法の提供。【解決手段】HERの二量体化を効果的に阻害するHER2抗体とゲムシタビンとの組み合わせを用いて、プラチナ耐性の卵巣ガン、原発性腹膜ガン、または卵管ガンを処置する方法。【選択図】なし